I can remember going from a 20 watt Panaramic/Magnavox 'accordion' tube amp at about 15 pounds directly to the 40 watt 147 system and I was in heaven even at 150 pounds(the speaker was heavier than me in those days). From there, I went to - what was like a 145 but vinyl clad rather than a wood finish. Then, to an Ampeg Quad 4 system. I had to borrow my brother-in-law's truck for gigs - vans weren't as plentiful then.
Ciao,
Jerry